关键词: 地震波形, 油田开发, 开发小层解释, 高精度储层预测, 哈法亚油田

Abstract: The current fine seismic prediction technology, to a certain extent, is an extension of seismic interpretation technology at the exploration stage. Influenced by the research method and complex geological conditions, the prediction technology is dramatically limited in description of small-size reservoir structures at the oilfield development stage. The mindset for seismic data interpretation which is different from that at the exploration is established to settle the requirements and bottlenecks for interpretation of small-size layers and reservoir prediction. This paper puts forward the seismic waveform interpretation work process at the development stage, making seismic data interpretation detailed from analysis of the original large-size wave group characteristics to analysis of the waveform characteristics. It includes three steps: (1) establishing the relations between seismic waveform and lithology/reservoir structure and characterizing seismic phase variations on the top of layer; (2) dividing the zones and belts and changing the phases to interpret the sub-layers on the basis of the relations between combination of lithological properties and seismic waveform changes; and (3) making high-precision quantitative prediction of reservoirs by means of the depth domain seismic waveform instructions. The seismic waveform characteristics were fully taken into account in the above-stated study. The research results were used for Hartha oil reservoir of Halfaya Oilfield, using the seismic waveform to describe bioclastic beach, interpret restrained development sub-layers, and instruct reservoir inversion. The research results were in line with the requirements for high-precision reservoir prediction at the development stage.